US 11,872,772 B2
Method and apparatus for fabricating a hybrid tube
Sanjiv Sinha, Champaign, IL (US); Placid M. Ferreira, Champaign, IL (US); Nenad Miljkovic, Urbana, IL (US); Manjunath C. Rajagopal, Champaign, IL (US); Gowtham Kuntumalla, McKinney, TX (US); and Akhilesh Sanjay Somani, McKinney, TX (US)
Assigned to THE BOARD OF TRUSTEES OF THE UNIVERSITY OF ILLINOIS, Urbana, IL (US)
Filed by The Board of Trustees of the University of Illinois, Urbana, IL (US)
Filed on Jul. 19, 2021, as Appl. No. 17/379,056.
Claims priority of provisional application 63/056,255, filed on Jul. 24, 2020.
Prior Publication US 2022/0024154 A1, Jan. 27, 2022
Int. Cl. B29C 70/32 (2006.01); B29L 23/00 (2006.01)
CPC B29C 70/32 (2013.01) [B29L 2023/22 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method of forming a hybrid tube, the method comprising:
rotating a mandrel about a longitudinal axis thereof;
during the rotating, helically winding a first strip about the mandrel, the first strip being dispensed at a predetermined angle from a first housing translating alongside the mandrel;
during or after the helical winding, while the mandrel is rotating, bonding overlapping strip portions on the mandrel, thereby forming the hybrid tube; and
forming one or more metal fins on the hybrid tube.